为了进一步推广液化天然气(LNG)燃料动力船舶的应用,利用计算流体动力学(CFD)软件FLACS进行LNG燃料动力船进行三维建模,综合考虑环境方面的因素,对LNG的泄漏扩散进行模拟,在此基础上进行爆炸事故后果模拟。对爆炸事故进行分析,得到特定事故情景下的LNG扩散半径、燃烧区域半径、爆炸对人以及建筑物的危害半径,模拟结果对船舶上的管线以及消防设施的布局有一定的指导作用,并且为进一步研究LNG燃料动力船舶的安全性提供了基础数据。

In order to more widely promote the liquefied natural gas (LNG) power ships, using computational fluid dynamics(CFD)software, FLACS, to establish a 3D model of the LNG power ship, with considering the environ-mental factors, simulating the leakage and diffusion of the LNG , and the consequence of explosion accident .Analy-sing the explosion accident can get the result of LNG diffusion radius , combustion radius , people and building ’ s hazard radius .These give a certain guiding to the layout of ship ’ s pipeline and the fire fighting facilities , and also provide basic data for further study the safety of LNG power ship .

液化天然气（ LNG）加注船是一种为LNG动力船提供燃料的新型船舶，国内目前尚处于起步阶段，缺乏相关安全标准和规范。采用国际定量风险评价（ QRA）的通用理念，研究适用于我国LNG加注船的安全评价方法，提出具体实施步骤和依据准则，并以国内某LNG加注船作为实例分析说明。建立加注船LNG火灾事故树，确定相关火灾事故概率；研究适合加注船火灾事故后果的方形火焰模型，以及LNG火灾热辐射对人体伤害的计算方法；参考国际海事组织（ IMO）的风险准则，确定LNG加注船个人风险和社会风险；最后与按NFPA－59A计算的防火间距作对比分析。通过计算，例中加注船的风险位于须采取相关安全措施的ALARP区域，风险控制区域半径20m。若按NFPA－59A要求计算防火间距，该加注船对外部须划定半径52m区域作为安全区域，且须将船身增长37m以满足内部防火要求，在实际工程中无法实现，相比较QRA方法更适合我国LNG加注船的安全评价工作。

Liquefied natural gas ( LNG) fueling vessel is a new ship used for adding fuel to LNG power ship.At present, the domestic LNG vessel is still in initial stage and lacking of relevant safety standards and specifications. The method being applicable to assess the safety of LNG fueling vessel in China was studied by applying the general idea of QRA ( Quantitative risk assessment ) , the specific implementation procedures and criterions were put for-ward, and the analysis and explanation were conducted by taking a domestic fueling vessel as example.The fault tree of fire accident in fueling vessel was established to estimate the probability of relevant fire accident.The rec-tangle fire model fitted to fire accident consequence of fueling vessel and the calculation method of human body in-jury by thermal radiation of LNG fire were studied.Then the individual and social risk of LNG fueling vessel were determined by referring to the IMO risk criteria.At last, the comparative analysi

为降低渔船燃油能耗，减少渔船污染排放，研究了液化天然气渔船（ LNG渔船）相关技术。 LNG渔船的核心技术在于双燃料发动机动力装置，围绕双燃料发动机动力装置所需空间的利用和布置是LNG渔船改造的一大难点。双燃料发动机动力装置相关配套设备科学合理的设计也是保证LNG渔船高效航行的重要因素。通过对LNG渔船船体改造、双燃料发动机动力装置改造和LNG燃料存储技术等方面进行分析，认为LNG渔船作为一种新型船舶，能有效地降低渔民燃料成本，改善船员作生活环境。

According to the spirit of our country’ s sustainable development strategy, in order to cut down the fuel consumption of fishing vessels, and to reduce fishing vessels’ pollution, trelevant technologies of LNG fishing vessel. Compared with traditional fishing vessel, there is a lot of innovation and breakthrough in technology for LNG fishing vessels. The core technology of LNG fishing vessel is dual fuel engine power plant. The use and arrangement of the space around dual fuel engine power plant is a big difficulty. The scientific and rational design of power plant’ s corollary equipment is an important factor for LNG fishing vessel’ s efficient navigation. Through analysis on LNG fishing vessel hull transformation, dual?fuel engine power plants renovation and LNG fuel storage technology, LNG fishing vessels, as the new type of fishing vessel can reduce fisherman’ s fuel cost and improve crew ’ s living environment. LNG fishing vessels conform to China ’ s sustainable

本文以LNG单燃料动力拖网渔船为例，主要介绍LNG动力系统的设计：LNG动力系统的安全设计、LNG动力管系的设计、LNG冷能利用。

This paper introduces the design of LNG-based power system for trawler, including the safety design of LNG power system, LNG power piping, and LNG cold energy utilization.

目前,国内LNG加注站主要用于汽车燃料的LNG加注,常规LNG加注站采用低温泵进行LNG汽车加注.本文主要介绍一种无需LNG泵输送,利用LNG自增压原理,开发了新型的无动力LNG加注装置.新型无动力 LNG 加注装置解决了高速公路、矿场等电力供应匮乏地区的 LNG 汽车加注难题,是LNG汽车加注市场前期开拓的一种有效手段.同时,还可以用作LNG汽车的应急救援车.

In our country, the LNG filling station is used to supply the vehicle fuel, and LNG is transferred by the LNG pump. In this paper, it introduces a new no-driving LNG vehicle fuel charge device, which is based on the LNG self-vaporizing principle. This device is the solution for the difficult problem of the LNG vehicle filling for the no power area, for example the long road and mine field. It is the means for the development the new LNG vehicle charge market, and it is also used to the emergency filling for the LNG vehicle .